Pay off this river?

[ciki57]

Villain is 35/16/3

I guess i probably only beat a bluff but villain is giving me pretty good odds...

Party Poker - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 6 Players - (LegoPoker HH Converter (http://www.legopoker.com/hh/))

<font color="black">Hero (SB): $32.70</font>
BB: $24.75
UTG: $28.10
MP: $26.20
CO: $27.05
BTN: $25.45

<font color="black">Preflop:</font> Hero is dealt T/images/graemlins/diamond.gif 9/images/graemlins/diamond.gif (6 Players)
UTG folds, <font color="red">MP raises to $0.75</font>, 2 folds, Hero calls $0.65, BB folds

<font color="black">Flop:</font> ($1.75) 9/images/graemlins/club.gif 4/images/graemlins/club.gif 7/images/graemlins/heart.gif (2 Players)
Hero checks, <font color="red">MP bets $1</font>, <font color="red">Hero raises to $3</font>, MP calls $2

<font color="black">Turn:</font> ($7.75) 2/images/graemlins/spade.gif (2 Players)
<font color="red">Hero bets $6</font>, MP calls $6

<font color="black">River:</font> ($19.75) 8/images/graemlins/club.gif (2 Players)
Hero checks, <font color="red">MP bets $7</font>, Hero ...