Che Guevara,
Sorry, I misread something previously.
According to the info that I have, the Aft Cargo Compartment usable volume for an EMB170 with IFE is 3.3 cubic meters.
The useable volume for an EMB170 without IFE is 4.6 cubic meters.
I am not certain how many "average" bags fit into the 1.3 cubic meter difference.