Please, I need help to create a volume mesh just in the shell.
I have two meshed bodies, the first one (pink color) is inside the second body (blue color).

I had applied Boolean operation (Boolean remove with merge) to get just the resulting shell (the dark blue region). The result was exactly what I expected:

I want to volume mesh just this dark blue shell (inside it will be filled with the pink body), but when volume mesh is generated, the whole body is filled and occur intersections between them, like in this image below

How can I create a volume mesh just for the shell, please?