Extract a single room as a 3d Solid from a linked model

Ok, that makes sense but two things. when i go to the 3D floor that I know the room is on now, i dont see dynamo trying to select it, however if I go to the standard OOTB 3D view that revit creates from the top ribbon, I can see it highlight it. However I cant Isolate it in view. Is there anyway to actually create something in revit in the shape of the room so that I can Isolate it? or better yet create some sort of bounding box or section box around that room and then isolate that so that I can see everything in the room and work with it?? ( section box would be best but a solid would be cool too) Thanks!