$109 Party Hand - Trip Jacks vs. another big stack on river

[Lloyd]

Party $109

The villain had been pretty aggressive. He hadn't shown down anything horrible but was definitely playing the big stack. I had just trippled up when my KK beat his QQ and another's AK.

Blinds 75/150

Villain: t9295
Hero: t6000

All fold to villain in CO-1 who limps for t150. Folded to me in SB with A[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/spade.gif[/img]. I complete and BB checks.

Pot: t450
Flop: J[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/diamond.gif[/img]

I bet t300. BB folds. Villain calls t300.

Pot: t1050
Turn: 9[img]/images/graemlins/club.gif[/img]

I bet t600. Villain calls t600.

Pot: t2250
River: J[img]/images/graemlins/diamond.gif[/img]

Range of hands for villain and what's your plan?