One card straight river push ugly board

[Everlong]

Opponent is unknown - miniscule sample says he is donkish but not very aggressive...I doubt he is capable of this sort of river bluff unless he is blind and thinks that trips are good here.

Call or fold? I agonized and banked but couldn't make the call.

Full Tilt Poker
No Limit Hold'em Cash Game
$0.10/$0.25 Blinds
6 Players
LegoPoker HH Converter

<font color="black">SB: $28.20</font>
BB: $13.50
<font color="black">Hero (UTG): $29.90</font>
MP: $11
CO: $56.60
BTN: $36.05

<font color="black">Preflop:</font> Hero is dealt 8[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (6 Players)
<font color="red">Hero raises to $1</font>, 3 folds, SB calls $0.90, BB folds

<font color="black">Flop:</font> ($2.25) 7[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/club.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $1.60</font>, SB calls $1.60

<font color="black">Turn:</font> ($5.45) J[img]/images/graemlins/spade.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $5.40</font>, SB calls $5.40

<font color="black">River:</font> ($16.25) 7[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">SB bets $16.25</font>, Hero folds
Uncalled bet of $16.25 returned to SB

Pot Size: $16.25 ($0.80 Rake)