Possible to open/convert Office 98 for Mac PowerPoint file

Is it possible to open or convert a Mac Office 98 PowerPoint file (.pp)? I don't need to edit it, just either convert it to a more recent version or save as a pdf. I don't have access to anything before OS X, but I still have a PowerPC laptop. Recent versions of PowerPoint refuse to open it, and I haven't been successful finding a converter. Alternatively, is there a service that would do something like this?