PS $5.50- QQ, A on the flop, Opinions??

[Beerocrat]

Hey everybody. I'm not a great player, but I'm working at it. This was a sticky situation for me, and am wondering if I could have avoided the situation, and how others would handle it. I considered pushing PF, but decided against it with 16BBs and 5 players left. Villian was tigher than most at this buy-in, seeing about one third of the flops and not scared to take a stab.

PokerStars Tournament, Big Blind is t150 (5 handed) Converter on pregopoker.com

UTG (t3955)
Hero (t2480)
Button (t2730)
SB (t2515)
BB (t1820)

Preflop: Hero is in CO with Q[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/diamond.gif[/img]
<font color="gray">UTG folds</font>, <font color="red">Hero raises to t400</font>, <font color="gray">Button folds</font>, SB calls t325, <font color="gray">BB folds</font>

Flop: (t950) 7[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] (2 players)
SB checks, <font color="red">Hero...

Any cBet here might as well be a push, but a c/r here is so common if he has an A.