have i set this up to fire the river?

[hamnegger]

PokerStars No-Limit Hold'em Tourney, Big Blind is t150 (9 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button (t10755)
SB (t17358)
BB (t10950)
UTG (t24251)
UTG+1 (t5000)
MP1 (t8850)
MP2 (t8000)
Hero (t11891)
CO (t4850)

Preflop: Hero is MP3 with A[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls t150, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t600</font>, <font color="#666666">4 folds</font>, MP1 calls t450.

Flop: (t1425) 8[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
MP1 checks, Hero checks.

Turn: (t1425) K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP1 bets t150</font>, <font color="#CC3333">Hero raises to t750</font>, MP1 calls t600.

River: (t2925) 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
MP1 checks, <font color="#CC3333">Hero ?
[

i checked the flop bc i felt a c-bet wasn't going to work on this board often enough. his turn bet was weak garbage so i decided to put some pressure on. i decided i have ak now. now should i bet the river ? how much? is this a decent play?