By default the installation looks for Apache in C:Apache24, C:Apache22 and C:Apache2, as your installation is none of these you need to set the environment variable MOD_WSGI_APACHE_ROOTDIR to the path you have installed it to.
On your system you would do this by running this in your command prompt:
set "MOD_WSGI_APACHE_ROOTDIR=F:Apache24"
Which sets the variable, and then you can run the pip command (in the same command prompt):
pip install mod_wsgi