late in tourny

[SideCash]

Hero ($7,409 in chips)
Villian ($7,591 in chips)

Blinds 400/800 10 man sng now heads up.

Dealt to hero [9C,6C] in BB
Villian calls sb.

I'm pretty new to sng's. Player is making moves but not very often. So far villian pushes when he hit's a monster. (Seen him do it 4 times and win every time) Has made several laydows to me in the past. What's the move here?

FLOP [board cards 5D,6S,3C ] $1600 in pot

Hero bets $800
Villain raises to $1600

??