blinds are 75/150, I have 9k and villain has 6k
I've been at the table for a few orbits; got a bunch of chips by getting it aipf against a LAG with 99 vs. AKcc and winning on a board of A9xcc, Tc, Ax or something. Also 3bet-shoved from SB vs BTN open before that and he folded; otherwise haven't done much. So prob have TAG image but willing to go with value hands.
Villain is to my direct left, he's younger and Latino and has been playing fairly snug. He limped AK UTG in a prior hand and then called a shove in a spot where it wasn't necessarily clear that a shove was forthcoming.
I'm UTG and open to 400 with Q

Q
Villain flats next to act, folds around.
Flop: 7

9

T

(pot 1025)
I bet 600 and he insta makes it 1400 with ~4k behind.
wug?