Based on the lack of AVOD, it sounds like this is a 75A, not a 75E.
The 75A is a PMNW plane that mainly flies TATL, so no Wi-Fi. It has 16 BE seats and 150 Y seats. Overhead video throughout the plane, and personal video players are passed out in BE on TATL flights.
The 75E are the ex-AA/TWA planes that joined the PMDL fleet, and like the 75A, do a lot of TATL flying. They also have 16 BE seats, and 158 seats in the back. AVOD at every seat. The 75E does have Wi-Fi, since these planes also fly JFK-SFO/LAX, among other random domestic flights.
Considering that these are the two 757 configurations with BE seats, it's not surprising that the FA confused them.