メキシコ pronunciation?

メキシコ is the katakana for Mexico-- Mekishiko. How would a native Japanese speaker pronounce this? Would it be:

Mek-shi-ko
Me-ki-shi-ko
Me-kish-ko
Me-ksh-ko

or something different??

He says it a couple of times in this video:

More generally, the /i/ in 「し」 will normally get devoiced, so I guess something like /me kish ko/ ?

Okay, that’s what I was kind of thinking, but I wasn’t sure if it was actually pronounced more like the English word Mexico. Thanks for the video, this is helpful!