Opp is a winning regular. How often is this a bluff that we beat? Also, is the best flop line to check behind or to bet?

[converted_hand][hand_history]Poker Stars, $7.34 Buy-in (100/200 blinds) No Limit Hold'em Tournament, 9 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

SB: 2,670 (13.4 bb)
BB: 1,155 (5.8 bb)
Hero (UTG+1): 6,215 (31.1 bb)
UTG+2: 7,575 (37.9 bb)
MP1: 2,985 (14.9 bb)
MP2: 2,191 (11 bb)
MP3: 2,310 (11.6 bb)
CO: 2,110 (10.6 bb)
BTN: 3,735 (18.7 bb)

Preflop: Hero is UTG+1 with Q Q
Hero raises to 450, 6 folds, SB calls 350, BB folds

Flop: (1,100) A 3 A (2 players)
SB checks, Hero bets 600, SB raises to 2,220 and is all-in, Hero ????

Call 24/7 against a good reg.
Just overthink the spot:
Why would he Jam there, if he has an Ace? Protection because of the flushdraw? Very rare.

Call.

Are you sure he's a winning reg? Seems a bit weird that he'd flatcall an ep open in the sb.

If you're sure: call, because he has a lower pp. If it was a fish I'd fold.

I believe it's not that simple this spot. If he is a winning reg there are some aspects we have to consider here:
He can be shoving with air ball because you bet 600$ into a 1100$ pot in a AAx board, you never do that with an A, and he knows that. Other aspect is that he knows he doesn't have fold equity so he could be doin' this move for value once you bet more than half of the pot. You screwed your hand when you bet 600$ into 1100$ pot. You should have bet something like 300$ and induce him to shove (making him think that he has FE and that you would fold anything that is not a Ax type of hand.)
That's my opinion only. I would like if people have more prespectives on this one, it's an interesting spot because it's against a winning reg. If it was against a donky random I would call every single day of my life :P

GL! If he's any decent, you're up vs 44-99 or flushdraws

call

so many mid pairs/flush draws in his range.

You should go all in...see where you are at in the hand.

...and this.

This.

Cbet is way too big. Call it off

What does a 13.5BB OOP SB winning reg flatting range look like in 180 turbos :S