While I'm not sure exactly how "fēənˈketō" would be pronounced (I'm not a native English speaker), that's more correct as to the prononciation of the "ch" (following the italian prononciation).

The prononciation written in English would be something like `fee-ahn-keh-toh`, with the accent on the thrid syllable (`keh`).

I just found this [website][1] in which there are actual recordings of italian (I hope) people pronouncing it. It sounds pretty good to me.


  [1]: https://forvo.com/word/fianchetto/