AT bubble play

not much info on the bigstack, he got most of his chips through PF all ins, the one pot i played against him i had AQ he had 77 flop QK7 all spades he checks flop makes value bet on river when Q hits, i lose (relatively) small pot... what hands is he raising with here/ should i have raised preflop / should i check that flop? / was i right to give up on that turn? /

PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (4 handed) converter

UTG (t5650)
Button (t1771)
Hero (t3587)
BB (t2492)

Preflop: Hero is SB with A[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/diamond.gif[/img].
UTG calls t100, <font color="#666666">1 fold</font>, Hero completes, BB checks.

Flop: (t300) 2[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets t300</font>, BB folds, <font color="#CC3333">UTG raises to t700</font>, Hero calls t400.

Turn: (t1700) J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">UTG bets t600</font>, Hero folds.

Final Pot: t2300