CO is showing 21/13/2.5, but no other reads...

Full Tilt No-Limit Hold'em, $0.25 BB (6 handed) Full-Tilt Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

saw flop|saw showdown

Button ($26.45)
Hero ($25)
BB ($15.90)
UTG ($13.40)
MP ($42.25)
CO ($24.65)

Preflop: Hero is SB with A, A.
2 folds, CO raises to $0.75, 1 fold, Hero raises to $2.5, 1 fold, CO calls $1.75.

Flop: ($5.25) 3, Q, Q (2 players)
Hero bets $3.75, CO raises to $7.5, Hero??

After a quick equity calculation on PokerStove, AA has 49% equity against 99+, AJs+, KQs, QTs+, AQo, KQo, QTo (although that range may be too wide). However, the problem with considering this equity calculation too seriously is that his 2x raise on the flop is a bit fishy, and so I feel like it weights his hands toward a Q, and it would be hard to play this postflop OOP. Any thoughts??

call. u are either way ahead or way behind and i think if u shove over that min raise u are repping a bigger hand then u actually have and probabily dont get much value outta worse hands. i'm then shoving any non diamond turn for value.

nice analysis

call and reevaluate the turn.