$400nl: heads up- big river bluff- 400bb deep

[snowbank]

Me and villain have been battling for a while. When he came to the table, I had around $2000+, up and down for a while, busted him, he bought back in, and is now up to around $1600, same as me. He 3 bets pf constantly, and I've done a bit of light 4 betting on him, but not a ton. He's called me VERY light a couple times, one time 3 streets with A high. However, he seems like a good aggro player, but definitely might be a leak how light he calls. I've made a ton of big river bets at him, the one's he's called I've either had a big hand, or air, so haven't done a ton of thin value betting on him. Here's the hand:

Hero: $1,600
Villain: $1,600

I raise 76o, villain 3 bets to $54, I make it $155. He calls.

Flop: 7AA, 2 clubs(I don't have a club)

He checks, I bet $200. He calls.

Turn: 4

He checks, I check.

River: 9c

He fires out $365.

I shove.