What's Philippu's pronunciation?

"ppu" is like "ppoo", but a guy told me something like this: "The double consonant does not affect the sound of the consonant itself, but of the vowel before it. In general, when there are two consonants in a row after a vowel, that vowel is pronounced more similar to how we do it in Spanish, in English they call it "short vowel". The other sound, which has an "e" before it, is called a "long vowel"".

So, knowing this, what's the pronunciation of Philippu?

I'm not English speaker, obviously.