J9s vs. a preflop 3-bet

[Nick C]

The river is what I'm wondering about. (Of course, other comments are appreciated also; I'd imagine, for instance, that preflop is debatable.)

Villain is 33/17/2.8 after 110 hands, and it's not such a great table, generally. During our most recent encounter, Villain and I capped it preflop. He had AK; I 3-bet from the blinds with AQ. The flop came KQX, and I called him down.

Party Poker 3/6 Hold'em (6 max, 6 handed) converter

Preflop: Hero is UTG with 9[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">Button 3-bets</font>, <font color="#666666">2 folds</font>, Hero calls.

Flop: (7.33 SB) 9[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets</font>, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">Button 3-bets</font>, Hero calls.

Turn: (6.66 BB) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets</font>, Hero calls.

River: (8.66 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets . . .</font>

And now Hero should do what?