Ngambi knocked down 11 of 14 shots and also had seven rebounds and two steals for the Tritons (6-10 overall, 6-10 in ICCAC), who completed a season sweep of the Hawks.
Iowa Central and Northeast were tied at 35-all at the break after Ngambi scored late in the half.
Over the final 20 minutes, the Tritons shot just under 47 percent from the field and received 16 combined points from Ngambi and Keck.
For Northeast, Michael Anderson had 20 points and Justin Hiser 11.
The Tritons return home on Saturday, welcoming in Indian Hills to Hodges Fieldhouse for a 3 p.m. tip.
-By Dana Becker