@trianon,

That is disappointing. I can't imagine the 3760 and 3750 are that much different. Just to be sure: what were you seeing on the myMaps settings screen? I see:

CN North America NT
2011.30 3D

and there is a checkmark on the left. This tells me it is unlocked, present and enabled. Again, I am sure you have a similar map for EU.

Note: the 3D building view also works even if you do not have the corresponding regular map. For example, I have the EU map installed and the North America 3D map: I can see the 3D buildings in the USA even if the US map is not installed.