AQ TPTK..who makes this call?

[DVC Calif]

From last night's $11R/$25k GTY. About 20 minutes into the second hour, so the R/A madness has settled down....somewhat. [img]/images/graemlins/tongue.gif[/img]

My read on Villain is that he is on the flush draw. He's been pushing his draws strong all first hour and still continues to play LAG.

I have TPTK but is that good enough to risk a third of my stack on? Or is that weak-tight? My gut is telling me I have him right now but that damn river has been killing me all week.

PokerStars No-Limit Hold'em Tourney, Big Blind is t150 (9 handed) converter

BB (t5725)
Hero (t17300)
UTG+1 (t18235)
MP1 (t4250)
MP2 (t14000)
MP3 (t7065)
CO (t7675)
Button (t5405)
SB (t19550)

Preflop: Hero is UTG with A[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">Hero raises to t450</font>, <font color="#666666">4 folds</font>, CO calls t450, <font color="#666666">3 folds</font>.

Flop: (t1125) 9[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t950</font>, <font color="#CC3333">CO raises to t7225</font>, Hero ...?